| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Axel McCort | Burnside High School | 1:00.48q |
| 2 | Angus Heslop | Ellesmere College | 1:01.10q |
| 3 | Dale Smith | St Thomas of Canterbury C | 1:01.18q |
| 4 | Joseph Maea | Hornby High School | 1:02.31 |
| 5 | Ryan Batin | Rudolf Steiner School | 1:02.57 |
| -- | Nick Rapana | Papanui High School | DNS |
| -- | Benjamin Vincent | St Bede's College | DNS |
| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Hector Roose Clark | St Andrew's College | 58.52q |
| 2 | Sam Fitzgerald | Riccarton High School | 1:01.21q |
| 3 | Sean Buijs | Shirley Boys High School | 1:01.93 |
| 4 | Elijah Hapi | Aranui High School | 1:03.06 |
| 5 | Yasuhiro Shima | Christchurch Boys High Sc | 1:04.95 |
| 6 | Nick Smeulders | Mairehau High School | 1:10.99 |
| -- | Masaki Saegusa Princigalli | St Bede's College | DNS |
| -- | Ryan Taplin | Rangiora High School | DNS |
| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Tim Wareing | Christchurch Boys High Sc | 1:00.51q |
| 2 | Chris Haxell | Lincoln High School | 1:01.59q |
| 3 | Dylan Laugesen | Combined Country High Sch | 1:01.90q |
| 4 | Matthew McLaughlin | St Thomas of Canterbury C | 1:02.08 |
| -- | Jared Graham | Rangiora High School | DNS |
| -- | Jason Rippon | Middleton Grange | DNS |
| -- | Aidan Ryan | St Bede's College | DNS |
| Placing | Athlete | Team | Finals |
|---|---|---|---|
| 1 | Hector Roose Clark | St Andrew's College | 56.80 |
| 2 | Sam Fitzgerald | Riccarton High School | 56.88 |
| 3 | Axel McCort | Burnside High School | 57.39 |
| 4 | Angus Heslop | Ellesmere College | 58.52 |
| 5 | Tim Wareing | Christchurch Boys High Sc | 1:00.16 |
| 6 | Dale Smith | St Thomas of Canterbury C | 1:00.19 |
| 7 | Dylan Laugesen | Combined Country High Sch | 1:00.88 |
| 8 | Chris Haxell | Lincoln High School | 1:01.55 |